Amazing GOOP 5400040 Coat-It Waterproof Epoxy Sealer & Protector - 2 lb Kit, Dark Gray
Coat-it is formulated with ceramic beads for abrasion resistance, graphite to give it slip or lubricity and Kevlar fiber for extreme toughness. It's a superior, waterproof epoxy sealer that will protect your boat bottom or truck bed. Coat-it can be applied to aluminum, fiberglass and wood surfaces with ease.